"He has kept me informed all the way along," Light says. "When he was talking about coming out because he was going to be outed ... he called ... and I said, 'Danny, I think you need to have a conversation with Herb (my longtime manager) about how to do this. They're going to out you so you should be talking about how you want to handle it with the press.'"

NEW YORK, NY - JANUARY 15: Danny Pintauro and husband Wil Tabares attend the Broadway Opening Night Performance of 'Honeymoon in Vegas' at the Nederlander Theatre on January 15, 2014 in New York City. (Photo by Walter McBride/WireImage)

Danny Pintauro and Propel Zero raise money for Much Love Animal Rescue in Malibu to celebrate how our four-legged friends help to keep us active and healthy at Church Estates Vinyard on April 2, 2011 in Malibu, California. (Photo by John Sciulli/WireImage)

Actor Danny Pintauro attends the ABC Entertainment's Casting Department's Party to Celebrate the New Faces of ABC Television on February 23, 1984 at Tavern on the Green in New York City, New York. (Photo by Ron Galella, Ltd./WireImage)

Actor Danny Pintauro attends the 47th Annual Drama Desk Awards on May 19, 2002 at Fiorello H. LaGuardia High School of Music & Art and Performing Arts in New York City, New York. (Photo by Ron Galella, Ltd./WireImage)

Actor Danny Pintauro attends the Ringling Bros. and Barnum & Bailey Circus Performance to Benefit Variety Club on August 7, 1997 at the Great Western Forum in Inglewood, California. (Photo by Ron Galella, Ltd./WireImage)

Actors Gordon Thomson and Danny Pintauro attending the party for 'ABC Talent Development Program' on February 23, 1984 at Tavern on the Green in New York City, New York. (Photo by Ron Galella, Ltd./WireImage)

"No, I wasn't worried because I knew he was taking responsibility for it, and I knew that he was taking care of himself," she explains. "And you could see how well he's doing."

ET talked to Pintauro on Monday, when he shared he himself was devastated when he heard the news 12 years ago. "It's like anybody hearing you have terminal cancer or something awful," Pintauro said candidly. "My life is forever changed."

The former sitcom star admitted that he contracted HIV because he wasn't careful and was having unprotected sex. He also said that, drugs, specifically meth, played a major part as well. According to Pintauro, this was the part that most disappointed his Who's the Boss? co-star, Tony Danza.

"I tell anyone who asks," Pintauro told ET about his HIV diagnosis. " ... Tony was great, but I can tell he was a little disappointed for the drugs part more than anything. I told Judith many years ago."